摘要： 在日光温室内研究了弱光对不同类型番茄干物质积累及矿质营养分配的影响。结果表明：中度以上弱光胁迫严重影响植株干物质的积累和分配，同时严重抑制植株对Mg，K的吸收和积累，而对N，P，Ca的积累影响较小，弱光下应合理增施镁肥和钾肥。番茄在弱光环境下，矿质元素在不同器官内的变化幅度不同，N在叶片中积累量的增长幅度最大，K在根系中积累量的增长幅度最大。野生型番茄品系在弱光环境下的干物质积累量下降幅度小于黄化型品系。

关键词: 弱光, 番茄, 干物质, 矿质营养

Abstract: The effects of low light on dry matter accumulation and macronutrient allocation in tomato were studied in this paper.The results showed that the dry matter accumulation in plant was seriously decreased in light density lower than 50% control condit ion.The absorption of magnesium and potassium by tomato plant was restrained by low light density,only little restrained at nitrogen,phosphorus and calcium.Enhancing application magnesium and potassium fertilizers for the improvement of tomato growth and development in low light density condition was important.The accumulation change of macronutrient were different in root,stem,and leaf.Nitrogen increment rate was the most in leaf,and potass-ium was in root.The decrease of dry matter accumulation was smaller in wild type line than aetiolated type line.

Key words: Low light, Tomato, Dry matter, Macronutrient

中图分类号: 

• S641.2